Of course it is possible that UFO's really do contain aliens as many people believe, and the government is hushing it up

I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.

Scientific discovery may not be better than sex, but the satisfaction lasts longer.

It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces

Time and space are finite in extent, but they don't have any boundary or edge. They would be like the surface of the earth, but with two more dimensions.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

If I have questions about the universe on my mind when I go to bed, I can't turn off. I dream equations all night.